Manifold flow , control

Connect a vacuum manifold to a vacuum source not to exceed 20 in Hg, and place a 1-L waste liquid trap between the manifold and the vacuum source. To use the manifold, remove the cover, and place a Luer hub solvent guide needle on the male Luer fitting of each flow control valve. Remove the collecting vessel rack, and replace the cover. Close all control valves on the manifold cover. 

An important feature of the distributed control system chosen is that the PCMs can communicate over a microwave link, thus allowing the well pad manifold modules to be included in the GC control system the hardwire data highway is limited to a distance of 5000 ft. (1524m) from the Host. The well chokes and manifold controls will remain on the SCAOA system, but the well pad will require continuous process control of the test separator, water injection flow control, and artificial lift gas flow control. 

Fig. 5. A gas manifold for the production of epitaxial layers of Group III—V semiconductors by OMCVD where I I represents a mass flow controller ...

Figure 3 is a schematic diagram of the pilot-test flow control system. The flow in the pilot-test tank was stratified into upper and lower zones created by the five upper injection/extraction wells and the five lower injection/extraction wells. The feed water was dispensed through a flow totalizer into the injection wells via a manifold and a series of ten controllable flow meters. The lower injection wells were fed directly with Beaverton city water. The upper injection wells were fed from three 6800-L tanks. Using three tanks allowed one tank to be actively supplying feed water, one to be full with the appropriate input solution, and one to be... 

Some support structures are also included for detachably retaining the various components of the system. Preferably the support structure can be of the assembly board type , which provides prearranged flow channels and connector ports. The desired components of the system can be fastened into these connectors by pins. The flow control system that makes up the ICS system can include pumps, flow channels, manifolds, flow restrictors, valves, etc. These components are equipped with the necessary fittings that allow them to be sealed with the prearranged or selectively located flow channels or connectors. The flow system can also include detachable mixing devices, e.g., static or ultrasonic, or with a chip-like design. The reaction units, whether chip-like or not, can be of thermal, electrochemical, photochemical or pressure type [84]. 

Automated instrumentation (vessels, manifolds, flow-lines, agitation, etc.) and software to perform and control mix and split encoded SP library synthesis... 

Figure 11-11. (A) Analysis of fmoc-alanine injected onto four columns in parallel using a simple manifold tee to distribute the flow to the columns. (B) Repeat analysis of fmoc-alanine onto four columns using the flow controller to distribute the flow evenly to the array of columns.

The experimental set-up consists of a feed, a reactor and an on-line gas analysis section. The feed section consists of a gas blending manifold including a series of thermal gas massflow controllers and a HPLC pump to feed water to an evaporator located downstream of the flow controllers. 

Figure 12.6 shows a process flow diagram of the AIMS (some details concerning gas delivery to the system has been excluded for simplification). The key components include (a) a feed gas manifold, which consists of a pressure regulators and a bank of mass flow controllers (M FCs) for on-line generation of the reaction feed gas mixture (b) a reactor manifold, which consists of dedicated MFCs that meter the feed gas mixture to individual parallel-operating microreactors and (c) an on-line reactor feed and product gas analysis system. A brief description of the various components that perform these various functions is given below. 

The feed gas mixing board indicated in Fig. 12.6 actually contains three parallel manifolds that control the process gas flow rates using a Redwood Microsystems (Redwood MicroSystems, Inc., 959 Hamilton Ave., Menlo Park, CA, 94025) MEMS-Flow MFC and three Redwood Microsystems normally closed Shut-Off... 

Valves (SOVs) (this assembly is referred to as the Redwood flow manifold). The composition of the reactor feed gas mixture is defined by setting the flow rates for each of the process gases using these dedicated mass flow controllers (MFCs). 

It is clear that the analyst has complete control over the amount of sample dispersion or dilution that occurs as the sample passes through the manifold. This control originates from the way in which the manifold is designed. What factors influence the sample dispersion in an FIA system Minor factors are the inside diameter of the tubing, the flow rate inside any one line, and the reaction coil length. Major factors can be sample size and flow rates between the different fluid lines. 

Fig. 16 Microfluidic genetic analysis (MGA) system, (a) Dyes are placed in the channels for visualization Scale bar. 10 mm). Domains for DNA extraction yellow), PCR amplification red), injection green), and separation blue) are connected through a network of channels and vias. SPE reservoirs are labeled for sample inlet ST), sidearm ( 4), and extraction of waste (EW). Injection reservoirs are labeled for the PCR reservoir PR), marker reservoir (MR), and sample waste (5W). Electrophoresis reservoirs are labeled for the buffer reservoir (BR) and buffer waste (BW). Additional domains patterned onto the device included the temperature reference TR) chamber and fluorescence alignment (FA) channel. The flow control region is outlined by a dashed box. Device dimensions are 30.0 x 63.5 mm with a total solution volume < 10 pL Scale bar. 10 mm), (b) Flow control region. Valves are shown as open rectangles. VI separates the SPE and PCR domains. V2 and V5 are inlet valves for the pumping injection, V3 is the diaphragm valve, and V4 is an outlet valve, (c) Device loaded into the manifold, (d) Intersection between SI and SA inlet channels, with the EW channel tapering to increase flow resistance Scale bar. 1 mm).

Constructed gas manifold with mass flow controllers (MFCs) for accurate gas proportioning. 

The constmction of a gas manifold incorporating four mass flow controllers allowed the mixing of water saturated air with dry air to produce test streams of gas with accurate RH. Measured amounts of hydrogen were then added to the test stream. An environmental test chamber was also constructed from an insulated cooler. A heating element on the test chamber and a proportional temperature controller allowed control of the gas temperature and thus the thin film temperature to within 0. PC. 

Nitrogen was used as carrier gas. The gas manifold used Brooks mass-flow controllers to deliver metered amounts of carrier and feed gases. After mass-flow controllers, all streams were heated by heat tracings. This was essential to prevent condensation for 12DCP. The partial pressure of the feed was determined by its fraetion of the total molar-feed-flow rate through the sample bed and the total pressure. The sample bed outlet was directed to a backpressure regulator for maintenance of the system pressure. Part of the sample bed effluent was split either to vent or to the inlet of a gas-chromatography unit. The concentrations in the outlet stream were analyzed by an on-line GC, in which a 30 m PoraPLOT-Q capillary column was used. 

The gas mixtures fed to the burner were prepared in a stainless steel manifold using electronic flow controllers. A range of rich ammonia flames was studied in which the fuel equivalence ratio ranged from 1.28 to 1.81. Flame temperatures were measured with Pt/Pt-13%Rh thermocouples. The bead diameter was only 0.12 mm so that the radiation correction was only 80 K. 

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